National Health & Safety Should I mix and match my COVID booster with my initial vaccine? A doctor weighs in 4:49pm November 19, 2021 Health Medical Treatments National Share URL copied to clipboard! Play Pause There was an error loading the media player. Copyright 2021 NPR. To see more, visit https://www.npr.org. 300x250 Ad More All Things Considered Arts National Revisiting our talk about the podcast 'You Didn't See Nothin,' now a Pulitzer winner Books Arts National Colm Toibin vowed to never write a sequel. Until 'Long Island' 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate